However, one newroyal familymember was noticeably missing from theBuckingham Palace balconyline up.
Archie Harrison Mountbatten-Windsor, the son ofPrince HarryandMeghan Markle, was nowhere to be seen, much to the annoyance ofroyal fans, who are now calling outthe Queenfor snubbingBaby Archie.
WATCH:British royalfamilyare all smiles duringTrooping theColour ceremony
Furious fans have questioned whetherthe QueenbannedArchie Harrisonfrom herofficial birthdaycelebration because he was too young.
Baby Archiewas born on May 6, so he was just over one month old on the day of theTrooping the Colour parade.
But there's no hard and fast rules surrounding when a royal can debut at the event, asthe Queenherself has proved in the past.
In fact, in 1964Queen Elizabethand PrincePhiliptook their then three-month-old son, PrinceEdward, out onto the Palace balcony at that year'sTrooping the Colourevent.
The Queen, Philip and baby Edward in 1964
Which is something that hasn't passedroyal expertsby, as editor ofMajestymagazine Ingrid Seward toldFabulous Digital: “The Queen, through her private secretary, could easily have saidArchiewas far too young for the Palace balcony, which indeed he is.
“She herself took baby PrinceEdwardonto the balcony in June 1964 but he was three months old and she wasthe Queenso she could do as she liked!"
WhileQueen Elizabethdoes make the rules, it's unlikely that she would want very young babies on the balcony.
“The last thing she wants is for millions of TV viewers to witness a childhood tantrum,” Ingrid added.
This year's balcony line up
A just over one year old,Prince Louis, the youngest child ofPrinceWilliam and KateMiddleton, made his debut at this year's event. He was joined by his brotherPrince George, 5,and sisterPrincess Charlotte, 4.
Meghan Markle,Duchess of Sussexalso made a surprise appearance at the celebration.The Duchessis currently onmaternity leaveand taking a break from her royal duties.